No abstract

No abstract

In this letter, a new micromachined 3‐D bandpass filter in the Ka‐band is proposed using the LIGA process. The characteristic impedance and design parameters for the 3‐D filter are determined from the experimental results and the filter design rule. The filter shows a wide‐bandpass characteristic of 39%, with an insertion loss of 1.7 dB at 33.2 GHz, and can be applicable in high‐power MMICs. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 199–201, 2001.

We study the distribution 1/σ dσ/dQ t , where Q t is the modulus of the transverse momentum vector, obtained by summing over all hadrons, in the current hemisphere of the DIS Breit frame. We resum the large logarithms in the small Q t region, to next-toleading logarithmic accuracy, including the non-global logarithms involved. We point out that this observable is simply related to the Drell-Yan vector boson and predicted Higgs Q t spectra at hadron colliders. Comparing our predictions to existing HERA data thus ought to be a valuable source of information on the role or absence of small-x (BFKL) effects, neglected in conventional resummations of such quantities.